I haven't played Ghosts for about 3 weeks now and it's no coincidence that was the date I bought BF4, you're right though it definitely plays faster than BF3 and Ghosts.
If you play certain game modes the maps are smaller than half of the maps in Ghosts and camping is not really an issue, it's a pity as I like Ghosts but I have no urge to play it at the moment because I find it boring.
Maybe the DLC might tempt me back but I'll be watching a few YouTube clips first to see if it's worth the money.